Fig. 3: Cardiovascular health monitor.
From: Multi-point sensing organic light-emitting diode display based mobile cardiovascular monitor

a The concept of the bilateral PPGs depending on the different artery condition. b The concept of CVD screening by using Multi-point PPG sensing. c Different PPG pulse indexes used for CVD screening test. d Validation environment. e CVD screening validation results: AUSPRatio versus Rise time difference.